1/*
2 * smp.h: PowerPC-specific SMP code.
3 *
4 * Original was a copy of sparc smp.h.  Now heavily modified
5 * for PPC.
6 *
7 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
8 * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 */
15
16#ifndef _ASM_POWERPC_SMP_H
17#define _ASM_POWERPC_SMP_H
18#ifdef __KERNEL__
19
20#include <linux/threads.h>
21#include <linux/cpumask.h>
22#include <linux/kernel.h>
23
24#ifndef __ASSEMBLY__
25
26#ifdef CONFIG_PPC64
27#include <asm/paca.h>
28#endif
29
30extern int boot_cpuid;
31
32extern void cpu_die(void);
33
34#ifdef CONFIG_SMP
35
36extern void smp_send_debugger_break(int cpu);
37extern void smp_message_recv(int);
38
39#ifdef CONFIG_HOTPLUG_CPU
40extern void fixup_irqs(cpumask_t map);
41int generic_cpu_disable(void);
42int generic_cpu_enable(unsigned int cpu);
43void generic_cpu_die(unsigned int cpu);
44void generic_mach_cpu_die(void);
45#endif
46
47#ifdef CONFIG_PPC64
48#define raw_smp_processor_id()	(get_paca()->paca_index)
49#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
50#else
51/* 32-bit */
52extern int smp_hw_index[];
53
54#define raw_smp_processor_id()	(current_thread_info()->cpu)
55#define hard_smp_processor_id() 	(smp_hw_index[smp_processor_id()])
56#define get_hard_smp_processor_id(cpu)	(smp_hw_index[(cpu)])
57#define set_hard_smp_processor_id(cpu, phys)\
58					(smp_hw_index[(cpu)] = (phys))
59#endif
60
61extern cpumask_t cpu_sibling_map[NR_CPUS];
62
63/* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
64 *
65 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
66 * in /proc/interrupts will be wrong!!! --Troy */
67#define PPC_MSG_CALL_FUNCTION   0
68#define PPC_MSG_RESCHEDULE      1
69/* This is unused now */
70#define PPC_MSG_DEBUGGER_BREAK  3
71
72void smp_init_iSeries(void);
73void smp_init_pSeries(void);
74void smp_init_cell(void);
75void smp_init_celleb(void);
76void smp_setup_cpu_maps(void);
77
78extern int __cpu_disable(void);
79extern void __cpu_die(unsigned int cpu);
80
81#else
82/* for UP */
83#define hard_smp_processor_id()		0
84#define smp_setup_cpu_maps()
85
86#endif /* CONFIG_SMP */
87
88#ifdef CONFIG_PPC64
89#define get_hard_smp_processor_id(CPU) (paca[(CPU)].hw_cpu_id)
90#define set_hard_smp_processor_id(CPU, VAL) \
91	do { (paca[(CPU)].hw_cpu_id = (VAL)); } while (0)
92
93extern void smp_release_cpus(void);
94
95#else
96/* 32-bit */
97#ifndef CONFIG_SMP
98extern int boot_cpuid_phys;
99#define get_hard_smp_processor_id(cpu) 	boot_cpuid_phys
100#define set_hard_smp_processor_id(cpu, phys)
101#endif
102#endif
103
104extern int smt_enabled_at_boot;
105
106extern int smp_mpic_probe(void);
107extern void smp_mpic_setup_cpu(int cpu);
108extern void smp_generic_kick_cpu(int nr);
109
110extern void smp_generic_give_timebase(void);
111extern void smp_generic_take_timebase(void);
112
113extern struct smp_ops_t *smp_ops;
114
115#endif /* __ASSEMBLY__ */
116
117#endif /* __KERNEL__ */
118#endif /* _ASM_POWERPC_SMP_H) */
119